The seasonal change in soil moisture reserves in dependence on the
genetic form of soybeans was studied. It has been established that the deep layers of
the soil (40-150 cm) more consistently reflect the influence of the plant component
than the surface ones. In 2021, water reserves decreased in the 0-150 cm layer: for the
Pentata variety - by 103 mm, and for the Onika variety- by 53 mm. Thus, Onika variety
(MG I) retained 50 mm more water in the field for the next season compared to variety
Pentata (MG III).
The content of soil moisture in different soil horizons of soybean
fields in the 0-150 cm layer was studied in years with different meteorological
conditions. The current forecast of the degree of aridity of the growing season is
carried out according to soil moisture data in the soil layer 0-150 cm. In the sawing the
critical level of soil moisture in rainfed soybean fields was 300 mm. In the pod filling
stage the critical level of soil moisture in rainfed soybean fields was 200 mm.
